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Simplifying x + 2y + 4z = 7 Solving x + 2y + 4z = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2y' to each side of the equation. x + 2y + -2y + 4z = 7 + -2y Combine like terms: 2y + -2y = 0 x + 0 + 4z = 7 + -2y x + 4z = 7 + -2y Add '-4z' to each side of the equation. x + 4z + -4z = 7 + -2y + -4z Combine like terms: 4z + -4z = 0 x + 0 = 7 + -2y + -4z x = 7 + -2y + -4z Simplifying x = 7 + -2y + -4z
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